From 64037017cc3804d9921bd9780570685871df8f0b Mon Sep 17 00:00:00 2001
From: mannol <eniz_vukovic@hotmail.com>
Date: Tue, 12 May 2015 22:16:00 +0200
Subject: Fix bug

---
 toxav/msi.c   |  6 ++++++
 toxav/toxav.c | 19 +++++++++++++++----
 toxav/toxav.h |  4 ++--
 3 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/toxav/msi.c b/toxav/msi.c
index d68e4a9c..65b6c4e4 100644
--- a/toxav/msi.c
+++ b/toxav/msi.c
@@ -205,6 +205,12 @@ int msi_hangup ( MSICall* call )
     MSISession* session = call->session;
     pthread_mutex_lock(session->mutex);
     
+    if ( call->state == msi_CallInactive ) {
+        LOGGER_ERROR("Call is in invalid state!");
+        pthread_mutex_unlock(session->mutex);
+        return -1;
+    }
+    
     MSIMessage msg;
     msg_init(&msg, requ_pop);
     
diff --git a/toxav/toxav.c b/toxav/toxav.c
index 31629c29..5e32f196 100644
--- a/toxav/toxav.c
+++ b/toxav/toxav.c
@@ -113,7 +113,7 @@ int callback_capabilites(void* toxav_inst, MSICall* call);
 
 bool audio_bit_rate_invalid(uint32_t bit_rate);
 bool video_bit_rate_invalid(uint32_t bit_rate);
-void invoke_call_state(ToxAV* av, uint32_t friend_number, uint32_t state);
+bool invoke_call_state(ToxAV* av, uint32_t friend_number, uint32_t state);
 ToxAVCall* call_new(ToxAV* av, uint32_t friend_number, TOXAV_ERR_CALL* error);
 ToxAVCall* call_get(ToxAV* av, uint32_t friend_number);
 ToxAVCall* call_remove(ToxAVCall* call);
@@ -998,6 +998,11 @@ int callback_invite(void* toxav_inst, MSICall* call)
     if (toxav->ccb.first)
         toxav->ccb.first(toxav, call->friend_number, call->peer_capabilities & msi_CapSAudio, 
                          call->peer_capabilities & msi_CapSVideo, toxav->ccb.second);
+    else {
+        /* No handler to capture the call request, send failure */
+        pthread_mutex_unlock(toxav->mutex);
+        return -1;
+    }
     
     pthread_mutex_unlock(toxav->mutex);
     return 0;
@@ -1018,12 +1023,15 @@ int callback_start(void* toxav_inst, MSICall* call)
     
     if (!call_prepare_transmission(av_call)) {
         callback_error(toxav_inst, call);
-        call_remove(av_call);
         pthread_mutex_unlock(toxav->mutex);
         return -1;
     }
     
-    invoke_call_state(toxav, call->friend_number, call->peer_capabilities);
+    if (!invoke_call_state(toxav, call->friend_number, call->peer_capabilities)) {
+        callback_error(toxav_inst, call);
+        pthread_mutex_unlock(toxav->mutex);
+        return -1;
+    }
     
     pthread_mutex_unlock(toxav->mutex);
     return 0;
@@ -1083,10 +1091,13 @@ bool video_bit_rate_invalid(uint32_t bit_rate)
     return false;
 }
 
-void invoke_call_state(ToxAV* av, uint32_t friend_number, uint32_t state)
+bool invoke_call_state(ToxAV* av, uint32_t friend_number, uint32_t state)
 {
     if (av->scb.first)
         av->scb.first(av, friend_number, state, av->scb.second);
+    else
+        return false;
+    return true;
 }
 
 ToxAVCall* call_new(ToxAV* av, uint32_t friend_number, TOXAV_ERR_CALL* error)
diff --git a/toxav/toxav.h b/toxav/toxav.h
index 994b3009..b0e7e37d 100644
--- a/toxav/toxav.h
+++ b/toxav/toxav.h
@@ -190,7 +190,7 @@ bool toxav_answer(ToxAV *av, uint32_t friend_number, uint32_t audio_bit_rate, ui
  * :: Call state graph
  *
  ******************************************************************************/
-typedef enum TOXAV_CALL_STATE {
+enum TOXAV_CALL_STATE {
     /**
      * The flag that marks that friend is sending audio.
      */
@@ -218,7 +218,7 @@ typedef enum TOXAV_CALL_STATE {
      * state will never be triggered in combination with other call states.
      */
     TOXAV_CALL_STATE_ERROR = 32768
-} TOXAV_CALL_STATE;
+};
 /**
  * The function type for the `call_state` callback.
  *
-- 
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